Forced air heater



FIG. 1 is a perspective view of a forced air heater according to the invention;

FIG. 2 is a front view of the invention in FIG. 1;

FIG. 3 is a rear view of the invention in FIG. 1;

FIG. 4 is a left side view of the invention in FIG. 1;

FIG. 5 is a right side view of the invention in FIG. 1;

FIG. 6 is a top view of the invention in FIG. 1; and,

FIG. 7 is a bottom view of the invention in FIG. 1.

The broken line showing is included for the purpose of illustrating portions of the article and forms no part of the claimed design. 

The ornamental design for a forced air heater, as shown and described. 